121363645 has 16 divisors (see below), whose sum is σ = 157091760. Its totient is φ = 89478144.

The previous prime is 121363643. The next prime is 121363657. The reversal of 121363645 is 546363121.

It can be written as a sum of positive squares in 8 ways, for example, as 5112121 + 116251524 = 2261^2 + 10782^2 .

It is a cyclic number.

It is not a de Polignac number, because 121363645 - 2¹ = 121363643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121363643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55941 + ... + 58069.

It is an arithmetic number, because the mean of its divisors is an integer number (9818235).

Almost surely, 2^121363645 is an apocalyptic number.

It is an amenable number.

121363645 is a deficient number, since it is larger than the sum of its proper divisors (35728115).

121363645 is a wasteful number, since it uses less digits than its factorization.

121363645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3024.

The product of its digits is 12960, while the sum is 31.

The square root of 121363645 is about 11016.5169177921. The cubic root of 121363645 is about 495.1037363785.

The spelling of 121363645 in words is "one hundred twenty-one million, three hundred sixty-three thousand, six hundred forty-five".